Stair-carpet fastener



(No Model.)

M.. KRIOKL. STAIR CARPET EASTENER Patented Jan. 24, 1882.

INVENTOR WITNESSES ATTORNEY u. PETERS, Fhotw-Lithognphur, Washinxlun. n. c.

UNITED STATES PATENT OFFICE.

MAURICE KRIOKL, OF NEilV YORK, ASSIGNOR TO HIMSELF AND WILLIAM LANG, OF BROOKLYN, NEW YORK;

STAl R-CARPET FASTENER.

SPECIFICATION formingpart of Letters Patent No. 252,680, dated January 24, 1882. Application filed December 9, 1881. 7(N0 model.)

To all whom it may concern Be it known that I, MAURICE KRIcKL, of the city, county, and State of New York, have invented certain new and useful Improvements in Stair-Carpet Fasteners, of which the following is a specification.

This invention has reference to an improved stair-carpet fastener by which the carpet may bequickly fastened to the steps and risers, and

10 also be readily removed for cleaning or other purposes; and the invention consists of a corner-plate having inclined side portions and slide pins, which are guided atthe under side of the angle-plate and adapted to be thrown outside ofthe plate in line with the longitudinal axis of the same, so as to pierce the carpet and take hold of the riser and step, respectively. The sliding pins are actuated by a key applied to the square end of ashaft, a pinion of which engages the toothed shanks of the pins for setting them in motion in either di rection.

In the accompanying drawings, Figure 1.

represents a perspective view of my improved stair-carpet fastener, shown as applied in po sition. Fig. 2 is a rear view of the fastener, parts being broken away; and Fig. 3 is a detail vertical transverse section on line Jr on, Fig. 2.

o gimilar letters of reference indicate corre- The corner-plate A is made of angular shape,

havinga rectangular center portion, a, and inclined triangular side portions, 1). The side portions, 1), are made in the shape of arightangled isosceles triangle, so that the cornerplate fits accurately into the angle formed between the riser and step. At the under side of the middle portion, a, are arranged two sliding pins, 01, with pointed ends, which pins are guided in a casing, their shanks d being rack-shaped and engaged by a center pinion,f, so that the points are moved simultaneously in opposite direction to each other. The sliding pins (1 are \stopped in either direction when the revolution of the pinion is completed.

--The shalt of the pinion extends through the middle portion, a,of the corner-plate, A, and

is provided at the outside with a square end, upon which the actuating-key is placed by which the pins are actuated. \Vhen the corner-plate A is placed in position on the carpet into the angle formed by rise; and step, and the key placed in position on the square end of the pinion-shaft and then'turned around its axis, the points are forced in outward direction beyond the edges of the corncr plate, so as to pierce the carpet, enter the riser and step, and attach the carpet securely thereto. For detaching the fastener, the pinionshaft is turned in opposite direction by the key, and thereby the points drawn back to the outside of the corner-plate, so that the fastener and the carpet may be removed.

The end of the pinion-shaft may be covered, if desired, by means of a rosette-shaped screwcap,f, so as to place it out of sight and impart to the fastener a more ornamental appearance.

In place of the pinion and the rackshaped shanks of the slide-pins, any other equivalent actuating mechanism may be employed, as 1.85 do not confine myself to that shown and described. c

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent 1. The combination, with an angular cor- 9o ner-1' late,0fs1iding and pointed pins and mechanism whereby the same are forced in line with the axis of the fastener to the outside of the same, substantially as and for the purpose set forth. 5

2. The combination of an angular cornerplate, A, having inclined triangular corner portions 1), with sliding and pointed pinsd, guided at the under side of the corner-plate, andactuated by a center pinion intermeshing with rack-shaped shanks of the pins, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses. 1

Witnesses: MAURICE KRIOKL.

PAUL GoEPEL, CARL KARP. 

